Caution: Articles written for technical not grammatical accuracy, If poor grammar offends you proceed with caution ;-)
It’s no secret that this is a feature that I’m very excited about. This feature although very useful on it’s own is going to open up the door for many new exciting capabilities with out VMware products in the future.
Resource contention is one of the most critical issues in any virtualized environment. When contention occurs, applications slow down and your users are affected. Up until now two different methodologies have been employed to mitigate the risk of contention, with varied results. But now I want to introduce you to the new “game changing” method available from VMware: Predictive DRS! But first a bit of a history lesson on the original two methods.
The first of these is the Reactive Method which focuses on resolving unexpected resource demand. The most widely used example of a reactive solution is VMware’s Distributed Resource Scheduler, or DRS. As the day progresses, workloads may need more resources, which can lead to contention on the host. The reactive method moves VMs around to ensure all workloads get the resources they need and applications remain healthy. Note this method needs only a minimal amount of VMs to be moved in order to be effective, which means minimal overhead. The reactive method only moves VMs when contention approaches, so it’s possible (however remote) for users to feel some effects of the contention before it’s resolved.
Learn more about the other methods available with predictive DRS in the original article on VMware Cloud Management blog site.